KR20040090820A - Apparatus for lighting flash of mobile phone - Google Patents

Apparatus for lighting flash of mobile phone Download PDF

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Publication number
KR20040090820A
KR20040090820A KR1020030024785A KR20030024785A KR20040090820A KR 20040090820 A KR20040090820 A KR 20040090820A KR 1020030024785 A KR1020030024785 A KR 1020030024785A KR 20030024785 A KR20030024785 A KR 20030024785A KR 20040090820 A KR20040090820 A KR 20040090820A
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South Korea
Prior art keywords
flash
camera
driving pulse
leds
light emitting
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KR1020030024785A
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Korean (ko)
Inventor
강창수
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엘지전자 주식회사
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Priority to KR1020030024785A priority Critical patent/KR20040090820A/en
Publication of KR20040090820A publication Critical patent/KR20040090820A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Studio Devices (AREA)

Abstract

PURPOSE: A device for lighting a flash of a cellular phone is provided to light LEDs(Light Emitting Diodes) for a flash at certain intervals by using a driving pulse string without continuously lighting the LED while photographing an image with a cellular phone camera, thereby realizing power-saving effects. CONSTITUTION: An MSM(Mobile Station Modem)(1) outputs a driving pulse string for lighting LEDs of a flash(4). A camera(2) photographs a subject to be pictured under the control of the MSM(1). In a photographing mode of the camera(2), the LEDs are lighted in the flash(4) at certain intervals during a predetermined time by the driving pulse string when a peripheral luminous intensity is less than a certain value. The flash(4) divides the LEDs into two groups, and alternately lights the divided LEDs by using the driving pulse string.

Description

휴대폰의 플래시 점등장치{APPARATUS FOR LIGHTING FLASH OF MOBILE PHONE}Flash lighting device for mobile phone {APPARATUS FOR LIGHTING FLASH OF MOBILE PHONE}

본 발명은 휴대폰에 적용된 카메라용 플래시를 절전모드로 구동하는 기술에 관한 것으로, 특히 소정 개수의 카메라용 발광다이오드를 계속적으로 점등시키는 것이 아니라, 구동 펄스열을 이용하여 해당 주기로 점등시키는데 적당하도록 한 휴대폰의 플래시 점등장치에 관한 것이다.The present invention relates to a technology for driving a camera flash applied to a mobile phone in a power saving mode. Particularly, the present invention relates to a mobile phone which is suitable for lighting a predetermined number of cycles using a driving pulse train, instead of continuously lighting a predetermined number of camera LEDs. It relates to a flash lighting device.

근래 들어, 휴대폰이 널리 보급되어 현대인의 생활 필수품으로 자리매김되고 있는데, 이러한 휴대폰은 고유의 통화 기능은 물론 각종 생활정보, 단문 메시지 등의 데이터 통신 기능을 제공하고 있다.In recent years, mobile phones have become widespread and are becoming a necessity for modern people. These mobile phones provide not only a unique call function but also various communication information such as life information and short messages.

최근에는 디지털 카메라를 탑재하여 원하는 피사체를 즉시 촬영(정지영상 또는 동영상)할 수 있을 뿐만 아니라 촬영된 영상 파일을 저장해 두었다가 임의의 시점에서 화면으로 출력하거나 통신망을 통해 원격지로 전송할 수 있게 되었다.Recently, digital cameras are not only used to capture a desired subject immediately (still image or video), but also to store the captured image file and output it to a screen at any time or to transmit it to a remote place through a communication network.

통상적으로, 어두운 장소에서 촬영할 때 플래시를 사용하게 되는데, 종래 휴대폰의 플래시 점등기술에 있어서는 소정 시간동안 여러개의 발광다이오드(예: 8개)를 계속 점등시켜 주위의 조도가 일정치 이상으로 유지되게 하였다.In general, a flash is used when shooting in a dark place. In the flash lighting technology of a conventional mobile phone, several light emitting diodes (for example, 8) are continuously turned on for a predetermined time so that the ambient illuminance is maintained above a certain level. .

참고로, 상기 카메라는 정지화상 및 동영상 촬영 기능을 구비하고 있으며, 상기 플래시의 점등시간은 일반적으로 1∼3초이다.For reference, the camera is provided with a still image and a moving image capturing function, and the lighting time of the flash is generally 1 to 3 seconds.

이와 같이 종래의 휴대폰 카메라에 있어서는 어두운 장소에서 촬영하는 경우, 소정 시간동안 여러개의 발광다이오드를 계속 점등시키도록 되어 있어 불필요하게 많은 전력을 소모하는 결함이 있었다.As described above, in the case of photographing in a dark place in the conventional mobile phone camera, several light emitting diodes are continuously turned on for a predetermined time, and thus there is a drawback of unnecessary power consumption.

따라서, 본 발명의 목적은 카메라 촬영 시 플래시용 발광다이오드를 계속적으로 점등시키는 것이 아니라, 구동 펄스열을 이용하여 소정 주기로 점등시키는 휴대폰의 플래시 점등장치를 제공함에 있다.Accordingly, it is an object of the present invention to provide a flash lighting device of a mobile phone which turns on a flash light emitting diode at a predetermined cycle using a driving pulse train instead of continuously lighting the flash light emitting diode when photographing a camera.

도 1은 본 발명에 의한 휴대폰의 플래시 점등장치의 블록도.1 is a block diagram of a flash lighting device of a mobile phone according to the present invention.

***도면의 주요 부분에 대한 부호의 설명****** Description of the symbols for the main parts of the drawings ***

1 : 중앙처리장치 2 : 카메라1: central processing unit 2: camera

3 : 엘씨디 4 : 플래시3: LCD 4: Flash

도 1은 본 발명에 의한 휴대폰의 플래시 점등장치의 일실시 구현예를 보인 블록도로서 이에 도시한 바와 같이, 시스템 각부를 총괄 제어함과 아울러, 후술할 플래시(4)에 발광다이오드의 구동 펄스열을 출력하는 중앙처리장치(또는 MSM: Mobile Station Modem)(1)와; 상기 중앙처리장치(1)의 제어를 받아 정지영상 또는 동영상을 촬영하기 위한 카메라(2)와; 상기 촬영된 영상 및 각종 정보를 표시하기 위한 엘씨디(3)와; 상기 카메라(2)의 촬영모드에서 주위 조도가 일정치 이하일 때상기 중앙처리장치(1)로부터 공급되는 펄스열을 이용하여, 소정 개수의 발광다이오드를 소정 시간동안 해당 주기로 점등시키는 플래시(4)로 구성한 것으로, 이와 같이 구성한 본 발명의 작용을 상세히 설명하면 다음과 같다.1 is a block diagram showing an embodiment of a flash lighting device of a mobile phone according to the present invention. As shown in FIG. 1, the control pulses are collectively controlled, and the driving pulse train of the light emitting diode is applied to the flash 4 to be described later. A central processing unit (or MSM: Mobile Station Modem) 1 for outputting; A camera (2) for capturing a still image or a video under the control of the central processing unit (1); An LCD 3 for displaying the photographed image and various information; In the photographing mode of the camera 2, when the ambient illuminance is a predetermined value or less, a flash 4 for lighting a predetermined number of light emitting diodes at a corresponding period for a predetermined period of time using a pulse train supplied from the central processing unit 1 is configured. The operation of the present invention configured as described above will be described in detail as follows.

사용자에 의해 촬영모드가 설정되면 중앙처리장치(1)는 카메라(2)를 구동시켜 정지영상 또는 동영상을 촬영하게 된다. 이때, 상기 중앙처리장치(1)는 조도 센서(도면에 미표시)를 통해 주위의 밝기를 체크하여 일정치 이하인 것으로 판명되면 플래시(4)를 구동시키기 위한 제어신호를 출력한다.When the shooting mode is set by the user, the CPU 1 drives the camera 2 to capture a still image or a moving image. At this time, the central processing unit 1 outputs a control signal for driving the flash 4 when it turns out that the brightness of the surroundings is determined to be equal to or less than a predetermined value through an illuminance sensor (not shown in the drawing).

이때, 상기 플래시(4)에 장착된 소정 개수의 발광다이오드(예: 4개 내지 8개)를 소정시간(예: 1∼3초) 동안 계속적으로 점등시키는 것이 아니라, 상기 중앙처리장치(1)로부터 공급되는 구동펄스열을 이용하여 해당 주기로 점등시킨다.At this time, the central processing unit 1 does not continuously light a predetermined number of light emitting diodes (for example, 4 to 8) mounted on the flash 4 for a predetermined time (for example, 1 to 3 seconds). It is turned on by the relevant period by using drive pulse train supplied from.

상기 구동펄스를 이용하여 발광다이오드를 해당 주기로 점등시키는 방법에는 여러 가지가 있을 수 있다. 예를 들어, 16개의 발광다이오드를 구비하여 8개의 발광다이오드와 나머지 8개의 발광다이오드를 교대로 점등시키는 방법과, 8개의 발광다이오드를 구비하여 그들을 해당 주기로 점등시키는 방법이 있다.There may be various methods of lighting the light emitting diodes at the corresponding periods using the driving pulses. For example, 16 light emitting diodes may be provided to alternately light eight light emitting diodes and the remaining eight light emitting diodes, and eight light emitting diodes may be provided to illuminate them at a corresponding period.

물론, 상기와 같이 발광다이오드를 어떤 주기로 점등시키는 경우, 동일 개수의 발광다이오드를 계속적으로 점등시키는 것에 비하여 밝기는 조금 떨어지지만, 그에 비하여 절전 효과로 얻어지는 이득이 더 크다.Of course, when the light emitting diodes are turned on at a certain period as described above, the brightness is slightly lower than that of the same number of light emitting diodes being continuously lit, but the gain obtained by the power saving effect is greater than that.

상기와 같은 과정을 통해 촬영된 정지영상 또는 동영상은 즉시 엘씨디(3)를 통해 감상하거나, 메모리에 저장해 두었다가 임의의 시점에서 통신망을 통해 사용자가 지정하는 원격지로 전송된다.The still image or video captured by the above process is immediately viewed through the LCD (3), or stored in the memory and transmitted to a remote place designated by the user through a communication network at any point in time.

이상에서 상세히 설명한 바와 같이 본 발명은 휴대폰에서 카메라 촬영 시 플래시용 발광다이오드를 계속적으로 점등시키는 것이 아니라, 구동 펄스열을 이용하여 해당 주기로 점등시킴으로써, 절전 효과를 얻을 수 있다.As described in detail above, the present invention does not continuously turn on the flash light emitting diode when photographing the camera in the mobile phone, but by using the driving pulse train to turn on the corresponding cycle, a power saving effect can be obtained.

Claims (3)

플래시(4)의 발광다이오드를 점등시키기 위한 구동 펄스열을 출력하는 중앙처리장치(1)와; 상기 중앙처리장치(1)의 제어를 받아 피사체를 촬영하기 위한 카메라(2)와; 상기 카메라(2)의 촬영모드에서, 주위 조도가 일정치 이하일 때 상기 구동 펄스열에 의하여 소정 개수의 발광다이오드가 소정 시간동안 해당 주기로 점등되는 플래시(4)를 포함하여 구성한 것을 특징으로 하는 휴대폰의 플래시 점등장치.A central processing unit (1) for outputting a drive pulse train for turning on the light emitting diode of the flash (4); A camera (2) for photographing a subject under the control of the central processing unit (1); In the photographing mode of the camera (2), the flash of the mobile phone, characterized in that it comprises a flash (4) is a predetermined number of light-emitting diodes are turned on for a predetermined period of time by the drive pulse train when the ambient illuminance is below a certain value Lighting device. 제1항에 있어서, 플래시(4)는 상기 발광다이오드를 두 그룹으로 나누어, 상기 구동펄스열을 이용하여 교대로 점등시키도록 구성된 것을 특징으로 하는 휴대폰의 플래시 점등장치.2. The flash lighting device of claim 1, wherein the flash (4) is configured to divide the light emitting diode into two groups and to alternately light the light using the driving pulse train. 제1항에 있어서, 플래시(4)는 상기 발광다이오드를 한 그룹으로 구성하고, 상기 구동펄스열을 이용하여 소정 주기로 점등시키도록 구성된 것을 특징으로 하는 휴대폰의 플래시 점등장치.2. The flash lighting device of claim 1, wherein the flash (4) comprises the light emitting diodes as a group, and is configured to light at predetermined intervals using the driving pulse train.
KR1020030024785A 2003-04-18 2003-04-18 Apparatus for lighting flash of mobile phone KR20040090820A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160087324A (en) * 2015-01-13 2016-07-21 삼성전자주식회사 Camera activation and illuminance
WO2016114536A1 (en) * 2015-01-13 2016-07-21 Samsung Electronics Co., Ltd. Camera activation and illuminance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160087324A (en) * 2015-01-13 2016-07-21 삼성전자주식회사 Camera activation and illuminance
WO2016114536A1 (en) * 2015-01-13 2016-07-21 Samsung Electronics Co., Ltd. Camera activation and illuminance
US9794461B2 (en) 2015-01-13 2017-10-17 Samsung Electronics Co., Ltd. Camera activation and illuminance

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